Cover Girl HP-65

[Frozen North]

Like some of you folks, I've been around awhile and I was a subscriber to Scientific American back in March 1976 when the HP-65 was the cover girl for the magazine:

The corresponding well written and very informative article titled The Small Electronic Calculator was authored by Eugene W. McWhorter, an engineer at Texas Instruments. And although I haven't seen the text in thirty-eight years, I can still remember it as my introduction to BCD arithmetic.

The article text is for sale at: http://www.scientificamerican.com/articl...alculator/

If you were a reader of the magazine in those days, you might recall the calculator advertising war between HP and TI with each company placing single or double page ads every month. Three months before the above issue appeared, I had seen enough to switch from my TI SR-50 to an HP-25. I would've gotten an HP-65 at US$795, but I was a just an undergrad with little money and the US$195 HP-25 hit my budget limit.